Short, factual and clear
A good complaint letter is short, factual and specific about the fix you want. The FTC advises including only the details that describe the problem and the resolution you want.
Name the outcome you want, such as a refund, a repair, an exchange or store credit, or ask the business to suggest a solution. Vague complaints get vague answers.
Say how long you will wait for an answer, and pick a date that gives the business time to act.
Send copies of receipts, contracts and earlier messages. Keep the originals and a copy of your letter.
Stay respectful. The person who reads it probably did not cause the problem, and a calm letter is easier to approve than an angry one.
Use certified mail with a return receipt. For an online complaint, print the screen or take a screenshot before you click submit.
If they do not answer, see what to do when a company will not respond.
This guide is general information, not legal advice. WriteMyReply is not a law firm. Rules and deadlines vary by state and by situation, so the letter you received and your own records control.